ci: auto-merge translation PRs once approved

.github/workflows/translate-labels.yml

@@ -33,7 +33,7 @@ jobs:
         run: pnpm install --ignore-scripts
 
       - name: Adjust labels
-        run: pnpm run ci:adjust-labels
+        run: pnpm run ci:adjust-labels --merge-if-approved
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PR_NUMBER: ${{ github.event.pull_request.number }}

src/cli/adjustLabels.ts

@@ -1,14 +1,35 @@
-import {adjustLabels} from '../api/ghLabels'
+import {parseArgs} from 'node:util'
+
+import {adjustLabels, PR_LABEL_APPROVED} from '../api/ghLabels'
+import {mergePR} from '../api/gitActions'
 import {runScript} from '../util/runScript'
 
 const PR_NUMBER = parseInt((process.env.PR_NUMBER || '').trim(), 10)
 if (!PR_NUMBER || PR_NUMBER <= 0 || isNaN(PR_NUMBER)) {
   throw new Error('PR_NUMBER environment variable is required')
 }
 
-runScript(() =>
-  adjustLabels({
+const {
+  values: {'merge-if-approved': mergeIfApproved},
+} = parseArgs({
+  strict: true,
+  options: {
+    'merge-if-approved': {
+      type: 'boolean',
+      description: 'Merge the PR if it is approved by a maintainer',
+      default: false,
+    },
+  },
+})
+
+runScript(async () => {
+  const result = await adjustLabels({
     prNumber: PR_NUMBER,
     logger: (message) => console.log(message),
-  }),
-)
+  })
+
+  if (mergeIfApproved && result === PR_LABEL_APPROVED) {
+    console.log('PR is approved, merging')
+    await mergePR(PR_NUMBER)
+  }
+})